Girls excell in certain parts of ballet, and boys excell at other parts of ballet. Boys need girls, and girls need boys in ballet.
As to that stupid posting about all males dancers being gay because they have to wear tights, I could spend hours disproving that crude remark, but I'll just say that if you really believe that wearing tights will somehow change your sexual identity, then 75% of all guys are gay, because that's how many of males have worn tights at least once in their lives before the age of 21!!![/i]